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Induction of pulmonary granulomas, macrophage procoagulant activity, and tumor necrosis factor-alpha by trehalose glycolipids.

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Trehalose 6,6' dimycolate (TDM), a mycobacterial glycolipid, induces granulomas and hemorrhagic toxic reactions when administered in oil but not as a suspension in saline. It was previously demonstrated by us that TDM forms highly structured layers at oil-water interfaces and then postulated that

Parallel antitumor, granuloma-forming and tumor-necrosis-factor-priming activities of mycoloyl glycolipids from Nocardia rubra that differ in carbohydrate moiety: structure-activity relationships.

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Multiple intravenous injections (30 micrograms, ten times) in ICR mice of trehalose dimycolate and glucose monomycolate from Nocardia rubra, containing C36-48 mycolic acids, showed a prominent antitumor effect on a subcutaneously implanted sarcoma-180, an allogeneic sarcoma of mice with a

Mycobacterium marinum lipooligosaccharides are unique caryophyllose-containing cell wall glycolipids that inhibit tumor necrosis factor-alpha secretion in macrophages.

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Earlier studies have reported a role for lipooligosaccharides (LOSs) in sliding motility, biofilm formation, and infection of host macrophages in Mycobacterium marinum. Although a LOS biosynthetic gene cluster has recently been identified in this species, many structural features of the different

Induction of interferons (IFNs) and tumor necrosis factor (TNF) in mice by a novel glycolipid trehalose 2,3,6'-trimycolate from Rhodococcus aurantiacus (Gordona aurantiaca).

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The immunomodifying activity of a novel mycoloyl glycolipid, trehalose 2,3,6'-trimycolate (GaGM), from a unique psychrophilic acid-fast bacterium, Rhodococcus aurantiacus, was examined. ICR mice were primed intravenously (i.v.) or intraperitoneally (i.p.) with liposomes containing GaGM (300

Effect of unique Mycobacterium leprae phenolic glycolipid-I (PGL-I) on tumour necrosis factor production by human mononuclear cells.

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Mycobacterium leprae cell wall-associated components are found in large amounts in the tissues of leprosy patients, particularly those at the lepromatous pole. Among these molecules, the phenolic glycolipid-I (PGL-I), unique to M. leprae, has been involved in the selective anergy observed in the

Tumor necrosis factor and interleukin 1 induce expression of the glycolipid verotoxin receptor in human endothelial cells. Implications for the pathogenesis of the haemolytic uraemic syndrome.

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Activation of the endothelium by TNF or IL-1 results in altered haemostatic properties of and leukocyte binding to the endothelium. In haemolytic uraemic syndrome, the endothelium of the kidney and sometimes other tissues is severely damaged, presumably by a bacterial toxin, verotoxin (VT). In vitro

Inhibitory effect on replicative DNA polymerases, human cancer cell proliferation, and in vivo anti-tumor activity by glycolipids from spinach.

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We succeeded in purifying a major glycolipids fraction (i.e., Fraction-II) in the class of monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG) and sulfoquinovosyl diacylglycerol (SQDG) from spinach using hydrophobic column chromatography. Fraction-II inhibited the activities of

Antibody to cell wall glycolipid of Gram-negative bacteria: induction of immunity to bacteremia and endotoxemia.

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Antiserum to the core glycolipid of gram-negative bacteria was prepared by immunization of rabbits with vaccine composed of killed cells of the uridine diphosphate galactose-deficient mutant (J5) of Escherichia coli O:111. Antiserum to J5 not only prevented death of animals from endotoxin but also

Early signal transduction induced by Candida albicans in macrophages through shedding of a glycolipid.

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Cell wall beta-1,2-oligomannosides are involved in Candida albicans binding to macrophages and in their stimulation to produce cytokines. The nature of signaling events occurring during initial interaction of macrophage J774 cell line and C. albicans, together with the nature of molecules containing

New glycolipids (chitooligosaccharide derivatives) possessing immunostimulating and antitumor activities.

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New glycolipids, derived from chitooligosaccharides of dp 2-4 and containing both free and acylated amino groups, were synthesized. The structure of the key compounds (di-, tri-, and tetra-saccharides acylated with different fatty acids) were elucidated by 13C NMR spectroscopy. Only the amino group

Anti-tumor effects of the glycolipids fraction from spinach which inhibited DNA polymerase activity.

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We succeeded in purifying the fraction of monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG), and sulfoquinovosyl diacylglycerol (SQDG) containing the major glycolipids from a green vegetable, spinach (Spinacia oleraceaL.). This glycolipids fraction inhibited the activities of

Schistosoma mansoni worm glycolipids induce an inflammatory phenotype in human dendritic cells by cooperation of TLR4 and DC-SIGN.

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In schistosomiasis, a major human parasitic disease caused by helminths, different life-stages of the parasite contribute to the developing host immune response. To increase our understanding of the mechanisms that play a role in shaping the host immune responses, we have investigated the effects of

Relationship between induction of macrophage chemotactic factors and formation of granulomas caused by mycoloyl glycolipids from Rhodococcus ruber (Nocardia rubra).

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Mycoloyl glycolipids cause granulomas in the lungs, liver, and spleen of mice, but the mechanism is not fully understood. To understand the role of macrophage chemotactic factors (MCFs) in granuloma formation, we prepared various mycoloyl glycolipids with different carbohydrate moieties: trehalose

Tumor necrosis factor alpha induces endothelial galactosyl transferase activity and verocytotoxin receptors. Role of specific tumor necrosis factor receptors and protein kinase C.

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Infections with verocytotoxin (VT) producing Escherichia coli have been strongly implicated in the epidemic form of hemolytic uremic syndrome (HUS). Endothelial damage plays a central role in the pathogenesis of HUS. In vitro studies have shown that VT can damage endothelial cells after interaction

Biological control of the soft rot bacterium Pectobacterium carotovorum by Bacillus amyloliquefaciens strain Ar10 producing glycolipid-like compounds.

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Four hundred and fifty bacteria were evaluated for antagonistic activity against bacterial soft rot of potato caused by Pectobacterium carotovorum sp strain II16. A strain Ar10 exhibiting potent antagonist activity has been identified as Bacillus amyloliquefaciens on the basis of biochemical and

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